*{box-sizing:border-box}html,body{color:#222;background:#f4f5f7;height:100%;margin:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;overflow:hidden}body{flex-direction:column;display:flex}header{color:#fff;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);flex-shrink:0;padding:10px 16px;box-shadow:0 2px 8px #0000001a}.header-row{flex-wrap:wrap;align-items:center;gap:16px;display:flex}.header-row .acc-bar{margin-left:auto}header h1{white-space:nowrap;margin:0;font-size:1.05rem;font-weight:600}.phase-tabs{flex-wrap:nowrap;align-items:flex-end;gap:2px;margin-left:8px;display:flex;overflow-x:auto}.phase-tab{color:#ffffffc7;cursor:pointer;white-space:nowrap;background:0 0;border:none;border-bottom:2px solid #0000;flex-shrink:0;padding:8px 14px;font-family:inherit;font-size:.85rem;font-weight:500;transition:color .12s,border-color .12s,background .12s}.phase-tab:hover{color:#fff;background:#ffffff14}.phase-tab.active{color:#fff;border-bottom-color:#fff;font-weight:600}.ribbon{background:#f3eaff;border-top:1px solid #0000000d;align-items:stretch;gap:0;margin:6px -16px -10px;padding:3px 10px 0;display:flex;overflow-x:auto}.ribbon-group{border-right:1px solid #d8c5f0;flex-direction:column;align-items:stretch;min-width:0;padding:3px 8px;display:flex}.ribbon-group:last-child{border-right:none}.ribbon-tools{flex:1;grid-template-rows:repeat(2,auto);grid-auto-flow:column;justify-content:start;align-items:stretch;gap:2px 3px;display:grid}.ribbon-group.one-row .ribbon-tools{grid-template-rows:auto}.ribbon-label{text-align:center;color:#7d5fa6;letter-spacing:.04em;text-transform:uppercase;-webkit-user-select:none;user-select:none;margin-top:3px;font-size:.62rem;font-weight:500}.tb-btn{color:#3b2566;cursor:pointer;white-space:nowrap;background:#fff;border:1px solid #cbb8e6;border-radius:4px;min-width:0;padding:3px 8px;font-family:inherit;font-size:.72rem;line-height:1.25;transition:background .12s,border-color .12s,color .12s,transform .1s}.tb-btn:hover:not(:disabled){background:#ebdcff;border-color:#a98cd6}.tb-btn:active:not(:disabled){transform:scale(.96)}.tb-btn.tb-active{color:#fff;background:#5a3a9a;border-color:#4a2a72;font-weight:600}.tb-btn.tb-active:hover:not(:disabled){background:#4a2a72;border-color:#3b2566}.tb-btn:disabled{opacity:.45;cursor:not-allowed}.tb-sep{background:#d8c5f0;width:1px;height:22px;margin:0 4px}main{flex:1;grid-template-columns:1fr 1fr;gap:12px;min-height:0;padding:12px;display:grid}.pane{background:#fff;border-radius:10px;flex-direction:column;min-height:0;padding:12px;display:flex;position:relative;overflow:hidden;box-shadow:0 2px 6px #0000000f}.pane h2{color:#555;margin:0 0 8px;font-size:1rem;font-weight:600}.pane-collapse{color:#5a3a9a;cursor:pointer;z-index:10;background:#fff;border:1px solid #cbb8e6;border-radius:6px;justify-content:center;align-items:center;width:26px;height:26px;padding:0;font-size:18px;font-weight:700;line-height:1;transition:background .15s,transform .15s;display:flex;position:absolute;top:8px;right:8px}.pane-collapse:hover{background:#f3eaff}.pane-collapse:active{transform:scale(.92)}.pane[data-pane=left] .pane-collapse:before{content:"‹"}.pane[data-pane=right] .pane-collapse:before{content:"›"}#main{transition:grid-template-columns .2s}#main.left-collapsed{grid-template-columns:44px 1fr}#main.right-collapsed{grid-template-columns:1fr 44px}#main.left-collapsed .pane[data-pane=left]>:not(.pane-collapse),#main.right-collapsed .pane[data-pane=right]>:not(.pane-collapse){display:none}#main.left-collapsed .pane[data-pane=left],#main.right-collapsed .pane[data-pane=right]{padding:6px 4px}#main.left-collapsed .pane[data-pane=left] .pane-collapse:before{content:"›"}#main.right-collapsed .pane[data-pane=right] .pane-collapse:before{content:"‹"}#floorplan-container,#viewer3d-container{background:#fafbfd;border:1px solid #e4e6eb;border-radius:6px;flex:1;min-height:400px;position:relative;overflow:hidden}.readouts{color:#444;flex-wrap:wrap;gap:18px;margin-top:10px;padding:8px 4px 0;font-size:.9rem;display:flex}.readouts span b{color:#667eea;font-weight:700}.tool-bar{gap:6px;margin-bottom:8px;display:flex}.tool-btn{color:#555;cursor:pointer;background:#f4f5f7;border:1px solid #e4e6eb;border-radius:5px;padding:6px 12px;font-family:inherit;font-size:.85rem;font-weight:500;transition:background .15s,color .15s,border-color .15s}.tool-btn:hover{color:#333;background:#e9eaef}.tool-btn.active{color:#fff;background:#764ba2;border-color:#764ba2}.props-panel{color:#444;background:#fafbfd;border:1px solid #e4e6eb;border-radius:6px;min-height:36px;margin-top:10px;padding:10px 12px;font-size:.85rem}.props-panel:empty{display:none}.props-panel .props-title{color:#2d1a4a;margin-bottom:6px;font-weight:600}.props-panel .prop-row{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.props-panel label{color:#444;align-items:center;gap:6px;display:inline-flex}.props-panel input[type=number]{border:1px solid #d6d8e0;border-radius:4px;width:64px;padding:4px 6px;font-family:inherit;font-size:.88rem}.props-panel input[type=number]:focus{border-color:#764ba2;outline:none;box-shadow:0 0 0 2px #764ba226}.props-panel .del-btn{color:#b33;cursor:pointer;background:#fee;border:1px solid #f3c8c8;border-radius:4px;margin-left:auto;padding:5px 10px;font-family:inherit;font-size:.85rem}.props-panel .del-btn:hover{background:#fdd}.props-panel .hint{color:#888;font-size:.85rem}.props-panel .hint b{color:#764ba2}.hint{color:#888;text-align:center;margin-top:8px;font-size:.78rem}@media (width<=900px){main{flex:none;grid-template-columns:1fr;height:auto;overflow:auto}#floorplan-container,#viewer3d-container{min-height:350px}}